Boosting catalytic activity toward industrial water electrolysis: Ag–triggered dual–site activation in NiFe LDH for ultra

▌Boosting catalytic activity toward industrial water electrolysis: Ag–triggered dual–site activation in NiFe LDH for ultra–efficient oxygen evolution reaction
提升工業水電解催化活性：Ag 觸發 NiFe LDH 雙位點活化實現超高效析氧反應

H. G. Edao, C. Y. Chang, W. B. Dilebo, C. B. Guta, K. Lakshmanan, E. A. Moges, F. T. Angerasa, B. D. Bejena, C. C. Chang, W. S. Liao, M. C. Tsai*, W. N. Su* and B. J. Hwang*
https://doi.org/10.1016/j.cej.2025.169637
SEED Member: B. J. Hwang, W. N. Su, M. C. Tsai

Major Contributions

1. Silver (Ag) incorporation into NiFe layered double hydroxide (LDH) triggers dual-site activation, simultaneously enhancing both Ni and Fe catalytic centers through electronic coupling, dramatically boosting oxygen evolution reaction (OER) activity for industrial water electrolysis.

2. The Ag-NiFe LDH catalyst demonstrates outstanding OER performance at industrial-scale current densities, with significantly reduced overpotential and improved long-term stability compared to unmodified NiFe LDH.

3. Mechanistic studies reveal how Ag modulates the NiFe LDH electronic structure and identifies the dual-site synergy responsible for enhanced OER turnover frequency, guiding the design of next-generation transition metal hydroxide electrocatalysts.

主要貢獻

1. 將銀（Ag）引入 NiFe 層狀雙氫氧化物（LDH），通過電子耦合同時增強 Ni 與 Fe 催化中心，觸發雙位點活化，顯著提升工業水電解的析氧反應（OER）活性。

2. Ag-NiFe LDH 催化劑在工業級電流密度下展現卓越的 OER 性能，相較未改性 NiFe LDH 顯著降低過電位並改善長期穩定性。

3. 機制研究揭示 Ag 如何調控 NiFe LDH 電子結構，識別負責增強 OER 轉換頻率的雙位點協同效應，指導下一代過渡金屬氫氧化物電催化劑設計。